Apple tv
My Apple TV keeps flashing no signal. I changed battery in remote, unplugged box and have Wi-Fi signal on television. Trying to watch prime video.
What is the model Apple TV?
Identify your Apple TV model - Apple Support
Find your Apple TV model number - Apple Support
What is its current version system software? Do you know?
Is the status light on the Apple TV box glowing continuously?
no signal
That usually means that the TV is not getting anything from the chosen HDMI port. Verify that the TV is set to take input for the HDMI port to which the Apple TV box is connected. See your TV settings.